Bangkok Taste is hands-down the best place to get Thai food in Grand Rapids. Everything from their Drunken Noodles to Green Curry to Curry Pad Thai is downright delicious and offered at a great value. In fact I would say this is one of my favorite places to eat in town.
Fair warning: while many Thai places claim to have high spice levels, this one really does. If you do not like hot food, order no spice or mild. It's still insanely delicious.